In 12-18 months it will matter a lot. You get one reliable update with your Samsung phone and it's about 6 months behind where it should be. After that, Samsung abandons your model. That's unacceptable for a phone of that price. Sorry, it just is.
IMHO, phone hardware is a vessel for amazing software. A Samsung phone is a Ferrari with no scheduled maintenance. Pixel is a porsche with a full warranty.
You can guess which one will run well in 2-3 years.
I agree somewhat and for those who want to invest in a phone for 2-3 years it is an issue I guess.
Not really an issue for me, I say "I'm going to sit this one out" and nek minnit, another shiny Samsung in my hand
If I were less impulsive, I'd probably go with something with more support.